Clutch-hook



(No Model.)

G. GREEN.

GLUTGH HooK.

Patente pr i UNITED STATES PATENT OFFICE.

CHARLES GREEN, OF READFIELD, MAINE.

CLUTCH-HOOK.

SPECIFICATION forming part of Letters Patent No. 274,9315, dated April3, 1883.

Application tiled February 14, 1883. (No model.)

hook detached trom the rope; Fig. 2, an edge view ot'l the same; andFig. 3, an isometrical perspective View, representing the-hook in use. pLike letters of' reference indicate corresponding parts in the dil'erentfigures of the drawings.

My invention relates to that class of clutchhooks which are employed inconnection with tackle for raising heavyweights, moving buildings, &c.;and it consists in a novel construction and arrangement of the parts, ashereinafter more fully set forth and claimed, by which a simpler,cheaper, and more effective device ot' this character is produced thanis now in ordinary use. l

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation, theextreme simplicity of the invention rendering an elaboratedescriptionunnecessary. Y E

In the drawings, A represents the body of the hook, and B the clevis orlink, which is U-shaped informi and detachably secured to the hook bymeans otl the bolt C and spring pin or key D. rlhe upper end of the hookis elongated, as shown at E, and curved outwardly, its convex edge, orthat portion nearest the point a, being serrated, or provided withangular indent-ations, as shown at m.

In the use of my improvement the hook A is attached to the weight orarticle to be raised,

as shown in Fig. 3, the end of the rope G being passed through the linkBfrom the side next the point a of the hook, and drawn as far aspossible, or untilthe body ofthe rope is taut. A strain is then broughtto bear on the rope, raising the link B and causing the rope to beclutched and securely held between the link a-nd serrated portion at' ofthe hookin a manner which will be readily obvious without a moreexplicit description. Y

y In order to better understand the principle on which the hookoperates, it will be seen that when the weight H is raised, by drawingup the rope G, and suspended, as shown in Fig. 3, the vertical axialline of the rope, it' extended, will touch the center of gravity intheweight, and that the bolt C stands outside ot' said line, therebycausing the rope to be clamped between the link and serrated end of thehook.

In all positions where it is necessary to advance the hook on the ropeto take a new bite'or hold of the same, it will be obvious that it maybereadily accomplished by slipping the link along the rope to any desiredposition, thus making a great saving in time over the usual method ofshortening or taking up the draft end of the rope through the`tackle-block, especially in moving buildings and work of a similarcharacter.

It will also be obvious that when the end of the rope cannot beconveniently passed through the link B the link may be readily detachedfrom the hook, passed over the rope, and attached again by means of thepin D.

Having thus explained :ny-invention, what I claim is- The bool A, havingthe serrated end E, and provided with the link B and bolt C, combinedand arranged to operate substantially as set forth.

CHARLES GREEN. Witnesses:4

STILLMAN L. HOWARD, WILLIAM OHARLEswoRTH.

